            &\multicolumn{1}{c}{30 Days}&\multicolumn{1}{c}{60 Days}&\multicolumn{1}{c}{90 Days}&\multicolumn{1}{c}{120 Days}&\multicolumn{1}{c}{30 Days}&\multicolumn{1}{c}{60 Days}&\multicolumn{1}{c}{90 Days}&\multicolumn{1}{c}{120 Days}\\
\\[-2mm] &\multicolumn{4}{c}{Georgia} & \multicolumn{4}{c}{Caltrans} \\ \cmidrule(l){2-5} \cmidrule(l){6-9} \\ 
\raisebox{-2.3mm}[0mm][0mm]{$\hat{\beta}$}&       0.175         &       0.311         &       0.210         &       0.176         &      -0.031         &       0.236         &       0.181         &       0.045         \\
            &     (0.162)         &     (0.206)         &     (0.206)         &     (0.201)         &     (0.578)         &     (0.570)         &     (0.597)         &     (0.606)         \\
\it{p-value}&     [0.278]         &     [0.130]         &     [0.309]         &     [0.382]         &     [0.957]         &     [0.680]         &     [0.761]         &     [0.941]         \\
\it{q}      &       0.757         &       1.000         &       1.000         &       1.000         &       1.000         &       1.000         &       1.000         &       1.000         \\
\it{h}      &       0.075         &       0.047         &       0.048         &       0.051         &       0.057         &       0.069         &       0.067         &       0.066         \\
Obs.        &      57,502         &      57,502         &      57,502         &      57,502         &      12,718         &      12,718         &      12,718         &      12,718         \\
\\[-2mm] &\multicolumn{4}{c}{Malta} & \multicolumn{4}{c}{Mongolia} \\ \cmidrule(l){2-5} \cmidrule(l){6-9}
\raisebox{-2.3mm}[0mm][0mm]{$\hat{\beta}$}&      -0.229&      -0.146&      -0.015&      -0.138&       0.125&       0.129&       0.052&       0.004\\
            &     (0.159)&     (0.174)&     (0.178)&     (0.170)&     (0.210)&     (0.222)&     (0.211)&     (0.212)\\
\it{p-value}&       0.148&       0.401&       0.933&       0.416&       0.550&       0.561&       0.804&       0.985\\
\it{q}      &       0.423&       1.000&       1.000&       1.000&       0.757&       1.000&       1.000&       1.000\\
\it{h}      &       0.335&       0.316&       0.308&       0.352&       0.053&       0.053&       0.061&       0.059\\
Obs.        &      59,109&      59,109&      59,109&      59,109&      88,434&      88,434&      88,434&      88,434\\
